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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kang-Wook Lee Ji-Chel Bea Murugesan, M. Fukushima, T. Tanaka, T. Koyanagi, M. |
| Copyright Year | 2015 |
| Abstract | Impacts of 3-D integration processes on device reliabilities in thinned DRAM chip were evaluated. The retention characteristics of memory cells were degraded depending on the decreased chip thickness, especially dramatically degraded below 40-μm thickness in the case with under-fill, meanwhile, the retention characteristics were relatively not so degraded until to 30-μm thickness, but suddenly degraded below 20-μm thickness in the case without under-fill. The retention characteristics of DRAM cell in the thinned DRAM chip which was CMP-treated dramatically degraded after intentional Cu diffusion from the backside surface at $300^{o}C$ annealing. Meanwhile, the retention characteristics in the thinned DRAM chip which was DP-treated did not degrade regardless of the well structure. The retention characteristics of some memory cell arrays with Cu TSV arrays began to degrade after annealing at $300^{o}C$ for 30min. As the annealing temperature increase higher than $400^{o}C,$ Cu atoms more spread out into larger area in the DRAM chip via poor barrier layers. |
| File Size | 2673546 |
| File Format | |
| ISBN | 9781467373623 |
| ISSN | 19381891 |
| DOI | 10.1109/IRPS.2015.7112733 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-04-19 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | DRAM chips Annealing Silicon Substrates Reliability Contamination Cu TSV 3-D DRAM retention time charge carrier lifetime Capacitance-time (C-t) Cu diffusion |
| Content Type | Text |
| Resource Type | Article |
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